Amichai was born and raised in his youth in Psagot. Later, he studied and was educated at the Alon Moreh Yeshiva and the Har HaMor Yeshiva.
During his military service, he married Talia, and together they had 5 children.
After his release from the army, Amichai and his wife moved to Kerem Shalom in the Gaza Envelope, where he worked in social work, worked with youth in agricultural education in the yeshiva program, and was very connected to youth education and